- published: 19 Jan 2014
- views: 1215469
In the context of evolution, certain traits or alleles of genes segregating within a population may be subject to selection. Under selection, individuals with advantageous or "adaptive" traits tend to be more successful than their peers reproductively—meaning they contribute more offspring to the succeeding generation than others do. When these traits have a genetic basis, selection can increase the prevalence of those traits, because offspring will inherit those traits from their parents. When selection is intense and persistent, adaptive traits become universal to the population or species, which may then be said to have evolved. Scientists who do experimental genetics employ artificial selection experiments that permit the survival of organisms with user-defined phenotypes. Artificial selection is widely used in the field of microbial genetics, especially molecular cloning.
Whether or not selection takes place depends on the conditions in which the individuals of a species find themselves. Adults, juveniles, embryos, and even eggs and sperm may undergo selection. Factors fostering selection include limits on resources (nourishment, habitat space, mates) and the existence of threats (predators, disease, adverse weather). Biologists often refer to such factors as selective pressures.
Everybody knows that the dice are loaded
Everybody rolls with their fingers crossed
Everybody knows that the war is over
Everybody knows the good guys lost
Everybody knows the fight was fixed
The poor stay poor, the rich get rich
That's how it goes
Everybody knows
Everybody knows that the boat is leaking
Everybody knows that the captain lied
Everybody got this broken feeling
Like their father or their dog just died
Everybody talking to their pockets
Everybody wants a box of chocolates
And a long stem rose
Everybody knows
Everybody knows that you love me baby
Everybody knows that you really do
Everybody knows that you've been faithful
Ah give or take a night or two
Everybody knows you've been discreet
But there were so many people you just had to meet
Without your clothes
And everybody knows
Everybody knows, everybody knows
That's how it goes
Everybody knows
Everybody knows, everybody knows
That's how it goes
Everybody knows
And everybody knows that it's now or never
Everybody knows that it's me or you
And everybody knows that you live forever
Ah when you've done a line or two
Everybody knows the deal is rotten
Old Black Joe's still pickin' cotton
For your ribbons and bows
And everybody knows
And everybody knows that the Plague is coming
Everybody knows that it's moving fast
Everybody knows that the naked man and woman
Are just a shining artifact of the past
Everybody knows the scene is dead
But there's gonna be a meter on your bed
That will disclose
What everybody knows
And everybody knows that you're in trouble
Everybody knows what you've been through
From the bloody cross on top of Calvary
To the beach of Malibu
Everybody knows it's coming apart
Take one last look at this Sacred Heart
Before it blows
And everybody knows
Everybody knows, everybody knows
That's how it goes
Everybody knows
Oh everybody knows, everybody knows
That's how it goes